package com.sky.service.impl;

import com.alibaba.druid.sql.parser.NotAllowCommentException;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import java.util.List;

/**
 * 套餐业务实现
 */
@Service
@Slf4j
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }

    /**
     * 新增套餐，同时需要保存套餐和菜品的关联关系
     */
    @Transactional
    public void saveWithFlavor(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        //向套餐表插入数据
        setmealMapper.insert(setmeal);
        //获取生成的套餐的id
        Long setmealId=setmeal.getId();
        //遍历菜品数据，插入套餐菜品关系表
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach((item)->{
            item.setSetmealId(setmealId);
        });
        //批量插入套餐菜品关系表
        setmealDishMapper.insertBatch(setmealDishes);

    }


    /**
     * 分页查询套餐
     * @param setmealPageQueryDTO
     * @return
     */
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page=setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 批量删除套餐
     */

    public void deleteBatch(List<Long> ids) {
        //起售中的套餐不能删除
        ids.forEach((id)->{
            Setmeal setmeal = setmealMapper.getById(id);
            if(StatusConstant.ENABLE==setmeal.getStatus()){
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });

        ids.forEach(setmealId->{
            //删除套餐表中的数据
            setmealMapper.deleteById(setmealId);
            //删除套餐菜品关系中的数据
            setmealDishMapper.deleteBySetmealId(setmealId);
        });
    }

    /**
     * 根据id查询套餐和对应的菜品数据
     */

    public SetmealVO getByIdWithDish(Long id) {
        Setmeal setmeal = setmealMapper.getById(id);
        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealID(id);

        SetmealVO setmealVO=new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }

    /*
     * 修改套餐
     */

    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);

        //修改套餐表
        setmealMapper.update(setmeal);
        //套餐id
        Long setmealId=setmealDTO.getId();
        //删除套餐菜品关系表中的数据
        setmealDishMapper.deleteBySetmealId(setmealId);

        //遍历菜品数据，插入套餐菜品关系表
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach((item)->{
            item.setSetmealId(setmealId);
        });
        //批量插入套餐菜品关系表
        setmealDishMapper.insertBatch(setmealDishes);
    }


    /**
     * 修改套餐状态
     */
    public void updateStatus(Integer status,Long id) {
        if(status == StatusConstant.ENABLE)
        {
            List<Dish> dishList = dishMapper.getBySetmealId(id);
            if(dishList!=null && dishList.size()>0)
            {
                dishList.forEach(dish -> {
                    if(dish.getStatus() ==StatusConstant.DISABLE){
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }

        Setmeal setmeal =Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }
}
